3.8 oz./yd² (US) 5.8 oz./L yd (CA), 100% polyester moisture-management/antimicrobial performance fabric; Knit collar with three-button placket; Back neck tape; Sport shoulder for maximum movement; Double needle stitched bottom hem; Tear away label; This product meets the following Sustainable Style subcategory:Socially Conscious Manufacturing: This product was made in a facility that has partnered with or is accredited by the Fair Labor Association.